"The key thing about scientific theories is that they should make successful predictions about as-yet unobserved data-points."
OK, so what is the scientific community's prediction about the next step in the evolutionary process?
Evolutionary biologists cannot predict the course of evolution in the distant future any better than a meteorologist can predict the weather in the distant future. That's not the sort of "prediction" being discussed here.
Some examples of successful predictions made by evolutionary theory
That it will occur.